Richard C. McMahon, MD
Internal Medicine Physician · Hudson, MA
Richard C. McMahon, MD is an internal medicine physician with a practice address in Hudson, Massachusetts, and NPI 1114949823, issued on Jul 24, 2006. Check the license (Massachusetts 51250, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Richard C. McMahon
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 51250 MA
Self-reported in NPPES; status is on the state search - Practice location
- 101 Coolidge St, Hudson, MA 01749
- Phone
- (978) 562-0757
- Enumerated
- Jul 24, 2006
- Record last updated
- Jan 17, 2024
- Fax
- (978) 562-9299
- Medicaid ID
- 6177093 MA
- Medicare enrollment
- Enrolled (PECOS I20050324000776); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 1977
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 101 Coolidge St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elizabeth HornAdult Health Nurse Practitioner1760795850
- Patricia Joy, LDNRegistered Dietitian1336326297
- Susan Lyons, NPPsychiatric/Mental Health Nurse Practitioner1477572964
Verify Richard C. McMahon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 51250Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
12% more Medicare Part D claims than the average internal medicine physician in 2024
3,556 Medicare Part D claims for 329 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 28 claims were for opioids.
Most prescribed
- Atorvastatin Calcium343 claims
- Lisinopril317 claims
- Amlodipine Besylate139 claims
- Simvastatin124 claims
- Metoprolol Succinate120 claims
- Hydrochlorothiazide116 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Charles River Medical Associates, PCHudson, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Richard C. McMahon among 6,825 internal medicine physician records in Massachusetts
Richard C. McMahon, MD is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1977 · median 2004 among the 4,103 with a school on file
- Record last updated2024 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
4 internal medicine physician records list a practice address in Hudson
They are 4 of the 303 NPPES records with a practice address in Hudson, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Hudson → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Michele Goh, MDHudson, MA 017491144281221
- Anupam Mathur, MDHudson, MA 017491720048424
- Christian Potter-Kablotsky, MDHudson, MA 017491912967613
- Stacey Beberman, M.D.Hopkinton, MA 017481134356843
- Michael Connors, MDHopkinton, MA 017481184690620
- Kevin Jillson, M.D.Hopkinton, MA 017481225476914
- Melissa Mahr, M.D.Hopkinton, MA 017481164441705
- Glenn Pransky, M.D.Hopkinton, MA 017481811014103
Common questions
What is Richard C. McMahon, MD's NPI number?
Richard C. McMahon, MD's National Provider Identifier (NPI) is 1114949823, issued on Jul 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Richard C. McMahon, MD located?
The NPPES record lists a practice address at 101 Coolidge St, Hudson, MA, 01749. Phone: (978) 562-0757. Providers update this record themselves, so call before visiting.
How can I verify Richard C. McMahon, MD's license?
NPPES lists Massachusetts license number 51250, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Richard C. McMahon, MD prescribe under Medicare Part D?
In 2024, Richard C. McMahon, MD had 3,556 Medicare Part D claims for 329 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.